Multi-Piston Closed Cycle Engine Pressure Wave Mitigation
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Solution Overview
Problem
Closed cycle engines, such as Stirling engines, face challenges in achieving high power output and power density while maintaining efficiency, due to issues like pressure wave propagation across fluidly connected chambers, which disrupts intended motion and causes power losses, vibrations, and potential damage.
Innovation Solution
A multi-piston engine apparatus with a balanced pressure and phase arrangement, where pistons are fluidly coupled in a way that pressure waves are mitigated, and equal and opposite forces are generated at adjacent piston assemblies, ensuring stable operation without mechanical linkages, and maintaining thermal differences for movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If closed cycle engines use fluidly connected chambers to enable thermal energy conversion, then power generation efficiency is improved, but pressure wave propagation causes power losses and vibrations
Solution Approach 1:
The engine system is divided into multiple independent piston assemblies, each with its own fluidly connected expansion and compression chambers. This segmentation allows pressure waves to be contained within individual assemblies rather than propagating through the entire system, reducing power losses while maintaining thermal energy conversion efficiency across multiple units.
Solution Approach 2:
Adjacent piston assemblies are arranged to generate equal and opposite forces through their pressure differentials. This counterbalancing arrangement cancels out vibrations and pressure wave effects, allowing the engine to maintain high efficiency operation without the harmful vibrations that would otherwise cause energy losses.
2Productivity
If closed cycle engines increase power output, then productivity is improved, but pressure wave propagation causes vibrations and potential damage
Solution Approach 1:
The patent employs multiple piston assemblies arranged in adjacent relationships where each assembly generates forces that are equal and opposite to its neighbors. This counterbalancing configuration cancels vibrations inherently, allowing the engine to achieve high power output without the harmful vibrations that typically accompany increased productivity in thermal engines.
Solution Approach 2:
By dividing the engine into multiple independent piston assemblies that operate in parallel, the system achieves high total power output while each individual assembly produces manageable pressure waves. The segmented structure prevents vibration amplification that would occur in a single large-engine configuration.
3Stability of the object's composition
If closed cycle engines use mechanical linkages to coordinate piston motion, then operational stability is improved, but device complexity increases
Solution Approach 1:
The patent removes mechanical linkages entirely from the system. Instead of using physical connections to coordinate piston motion, the invention relies on fluid pressure coupling and the natural thermodynamic cycles of the working fluid to synchronize piston assemblies, thereby maintaining operational stability while eliminating complex mechanical transmission components.
Solution Approach 2:
The system uses fluid pressure fields to coordinate the motion of multiple piston assemblies without mechanical linkages. The working fluid itself acts as the coupling mechanism, transmitting pressure signals and energy between chambers, which simplifies the mechanical structure while maintaining stable coordinated operation of all pistons.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances stability, balance, and power output by preventing pressure wave propagation, reducing vibrations and power losses, and improving overall operability of closed cycle engine assemblies.
Implementation Method 1
the first chamber defines an expansion chamber and the second chamber defines a compression chamber
Implementation Method 2
closed cycle engine arrangements, such as Stirling engines
Data Source
AI summary
A piston apparatus includes a plurality of piston assemblies respectively having a first piston body and a first piston disposed within a first volume defined by the first piston body, a second piston body and a second piston disposed within a second volume defined by the second piston body, and a connection member coupled to the first piston and the second piston. The first and second volume respectively include an expansion chamber and a compression chamber defined by opposite sides of the corresponding piston. The respective expansion chambers fluidly communicate with a corresponding compression chamber of another one of the piston assemblies. The first volume of a first piston assembly fluidly communicates with the first volume and the second volume of a second piston assembly, and the first volume of a third piston assembly fluidly communicate with the first volume and the second volume of the second piston assembly.